Mechanism for forming clocked, floated-thread hosiery



June 24, 1930. BERGMAN 1,766,772

MECHANISM FOR FORMING CLOCKED, ,FLOATED THREAD HOSIERY Filed March 11928 7 Sheets-Sheet June 24, 1930. H. K. BERGMAN 1,766,772

MECHANISM FOR FORMING CLOGKED, FLOATED THREAD HOSIERY Filed March 16,1928 7 Sheets-Sheet 2 Invenifor Ham" Ber man,

June 24, 1930. H, K. BER MAN' 1,766,772

MECHANISM FOR FORMING CLOCKED, FLOATED THREAD HOSIERY F'iled March 16,1928 '7 Sheets-Sheet 3 I II I llllHh J HHHHIIIHIIII f i 1') i O invwHarr yKBe-qgman, v

H. K. EERGMAN MFQGEJWZ MECHANISM FOR FORMING GLOGKED, FLOATED THREADHOSIERY June 24, 1930.

Filed March 16, 1928 7 Sheets-Sheet 5 June 24, 1930. H. K. BERGMAN1,766,772

MECHANISM FOR FORMING CLOCKED," FLQATED THREAD HOSIERY Filed March 16,1928 7 Shee'ts-She't 5 1135.11.

qfium 71:21 fi /36). H. K. BERGMAN 1,766,772

MECHANISM FOR FORMING GLOCKED, FLOATED THREAD HOSIERY 7 Sheets-Sheet '7Filed March 16, 1928 29% I Inveni/or: az'rylfifier gmam threads and thefloating thereof anism shown in Fig. 4;

parts, with parts in section;

Patented June 24, 1930 HABRF K. BERGMAN, OF. SHILLINGTON, PENNSYCOMPANY, OF CENTRAL FALLS, RHODE SETTS MECHANISM FOR FORMING' GLOCKED,IIELOA'J.ED-EIJHREAD HOSIERY Application filed March 16, 1928. SerialNo. 262,275.

This invention particularly relates to mechanism for forming. clockedstockings wherein the clocking thread or threads is or are floated fromclocking area to clocking area. Some of the features and combinations ofmy invention may, however, be used in other relations. t

' In order that the principle of the invention may be readilyunderstood, I have disclosed a single embodiment thereof in the ac-*companying drawings, wherein Fig. 1 is aside elevation of hosiery havingclocking areas formed by the mechanism of my invention;

Fig. 2 is a similar view but representing a different design ofclocking;

\Fig. 3 is a detail upon an enlarged scale, and showing the loops, ofthe clocking design of Fig. 1;

Fig. 3 is a diagrammatic representation constituting a horizontalsection taken. through the hose or stocking and represent ing theknitting in of the clocking thread or between the sides of the hose orstocking; I H

F i 4 is a front elevation of a circular knitting machine forknittingseamless hosiery, to which my invention may be employed; J v VFig. 4" is a side elevationiof a few links of the pattern chain employedin making the design of Fig. 1; J i Fig. 4 is a similar view, but oflinks employed in making the design of Fig. 2;

\ Fig. 5 is a left hand elevation of the mech- Fig. 6 is a plan view ofthe knitting cam block and certain of the cams and co-acting Fig. 7 isan inside elevation with parts in section showing the knitting cams andthe needles thereat;

Fig. 8 is a somewhat diagrammatic representation of thecircular seriesof needles to indicate the different lengths of butts, 1193 attemptbeing made to indicate accurately the total number of needles, butaccurately indig LVANIA, ASSIGNOR TO HEMPHILL. ISLAND, A CORPORATION OFMASSAGHU eating the number of so-called design needles rimployed inmaking the clocked hose of Fig. Fig. 9 is a perspective view of a few ofthe needles and indicating the different lengths of butts;

Fig. 10 is a plan view of the inner ends of certain of the cams andshowing the top center cam moved'outwardly one step so as to make one(double) stripe of fifclocking area, the so-called auxiliary cam beingwholly in;

Fig. 11 is a similar view but representing the 'top center cammoved onestep further out so as clocking area;

Fig. 12 is a similan view representing said top center cam moved out onemore step so as to make five stripes of the clocking area;

Fig. 13 is a similar view representing the top center cam all the Wayin, no clocking being made, and the auxiliary cam moved out for heel andtoe work;

showing the cam block and part of the cylto make three stripes of theinder with means for moving the auxiliary cam;

Fig. 15 isa plan View, with parts broken away, to show the thread oryarn fingers pref" erably used; and

Fig. 16 is a transverse central section showing one of the designirigyarn or thread fingers. l

The primary purpose of the invention is the 7 provision of mechanism formaking clocked hosiery of the character disclosedin the patent toClarence H. Taubel, No. 1,619,788, dated March 1 1927, and by the methodthere disclosed. ertain of the combinations of mechanism may in spmecases be employed in difl'erent relation, and my invention is notlimited in this respect exceptingas hereinafter claimed. In order tomake a clear presentation of the inventionI have NT OFFICE Y selected asone embodiment of my invention that Herein disclosed;and I shall withoutlim: iting myself thereto specifically. describe the same as for thepurpose of making a stocking ,of the character shown in said patent toTaubel, No. 1,619,788.

In Fig. 1, and upon an enlarged scale in ,Fig. 3, wherein a' part onlyof a hose 0.1 stocking is shown, I have represented at 1 a circular orseamless knit hose or stocking which may be ofany desired length, beingeither a womans stocking or, as herein shown, provided with a ribbed top2 in a manner generally characteristic of a manis hose. Such stockiniisprovided with a heel 3 and a toe 4 made, y a narrowing and wideningoperation, and desirably with the introduction of an additional yarn orthread orathe substitution of another yarn or thread in the making ofsuch heel or toe, in a manner not necessary more fully to describe. Thehose or stocking may be knit upon any suitable circular knittingmachine, as,

' fSr example, a Banner machine-of the general type disclosed in thepatent to Joshua' B. Hemphill, No. 933,443. While obviously the hose orstocking and the clocking thread or threads may be of any desiredcolors, I. will, for convenience of description only, refer to the bodythread or yarn of the hose or stocking as white in color. Such. threador yarn is introducedas the main or body thread in usual manner,not'necessary to describe. At any desired point, as, forexample, aslight distance below the rib' top, if the latter be provided, or at theboot or ankle portion of a womans stockin I introduce the clockingthread or one oI-a plurality of clocking threads. In the design orexample represented in Fig. 1, I have introduced two differently coloredthreads, herein for convenience represented as A and B, said threadsbeing fed in succession or otherwise according to the dictates of thepattern control. In the present instance, I have represented theclocking thread A as first introduced so as to make a single stripe,here shown as two wales in width. Immediately therebelow are shown threestripes which may be of the yarn B or the yarn A, or both yarns A and B.Immediately ,therebelow, I

have shown five stripes which likewise may be of any color orcombination of. colors; therebelow I show three stripes, and next belowthe same one stripe, after which the'described design is repeated asdesired. I have here shown the same extending into the foot. In Fig. Ihave diagrammatically indicated the clocldng threads A and B as floatedco. across the fabric, in the manner described the said Taubel patent.

In Fig. 2, I have representeda different design wherein two clockingthreads A and B of difierent colors are employed. Said 05 design, whichneed not be described in detail, as indicated at 5, it being merelynecessary to state that whereas in the making of the design of Fig. 1,separate links are employedto make the one stripe, the three stripe andthe five stripe areas, as indicated at 6, 7 and 8, in making the designof Fig. 2 I employ sets of two stepped links indicated at 9, 10, andhereinafter more fully referred to. For purposes of explanation merely,I have represented my invention as applied to a circular or seamlessh'osiery knitting machine of the well known Banner type' but it is to beunderstood that the invention may be applied equally well to other typesof circular knitting machines. 80 Referring now to Figs. 4 to 16, andfirst to Figs. 4 and 5, the framing of the machine is indicated at 11,and at 12 is indicated a table. or base plate surmounting the frame. Theneedle carrier orvcylinder 13 is journaled to rotate in the table 12 andis driven in the usual manner from the main drive shaft 14 havingthereon suitable pulleys, such, for example, as loose pulley 15, andfast pulleys 16 and 16 for imparting different speeds to the needlecarrier during reciprocating and ro-' tary knitting. Surrounding theneedle carrier 13 is a cam ring support or annular plate 17 whereon aremounted various cams for controlling the movements of the knittinginstruments. The member 17 may be of the usual construction and need notbe further described. The knitting needles 19 (generally indicated inFig. 4) may be of any desired type and are indicated as latch needlesarranged in grooves in the needle carrier 13 in usual manner to bereciprocated vertically therein by aset of knitting cams mounted upon ablock 20, indicated in Fig. 6 and elsewhere. Said cams include two main,oppositely positioned stitch cams 21, 22 performing the functions of thecorresponding cams in the usual Banner machines; the central cam 23, andtwo additional cams to which and I the movements whereof my invention ismore particular-lyfdirected. Above the central cam 23 is a top guide cam24 which, in the present instance, instead of being symmetricallypositioned, as, for exam le, in the patent to Lawson, No. 1,433,386,ctober'24, 1,922, is positioned ofi center or non-symmetrically.- ,Atthe left hand side of said top guide cam 24, viewing Fig. 7, is anauxiliary cam 25. These cams are shown upon an enlarged scale in Figs. 6and 10 to 13, and in Figs. 10 to 13 the dilferent positions of the saidtwo cams 24 and 25 are clearly indicated. Before referring to I theseveral positions of these cams I will refer to the character bf theneedles employed in the machine herein selectedjor disclosure of 12c myinvention.

Referring to Figs. 8 and 9, it will be observed that in the presentmachine I have dis- J closed five different lengths of butts. The so=called long butt needles in the selected emdilferent len bodiment of myinvention are indicated at 26 and they comprise one half the entirecircle of needles. The other half circle, of the needles is mainly madeup. of a set of needles 27, the butts whereof are herein referred to asspecial short butts, said butts being longer than those of the usualshort needles of the Banner machine. In addition, I have in thisembodiment of the invention disclosed three gths of butts of so-calleddesign ing needles. In the present instance, there are six of thesedesigning-needles at each of two opposite sides or parts of the needlecircle. U o

In Fig. 8, I Have represented at the top of the figure'and at the bottomthereof the longest-length-butt designing needle at 28, there being asingle such needle, here shown positioned next to the last needle of thelong butt series 26. Next to said needle 28 is a single one of thespecial short needles 27, and next thereto at the right is a singledesigning needle 29, the butt whereof isshorter than the butt of theneedle 28. Next thereto o'n the right is a single special short needle27 and next thereto on-theright are two designing needles 30 of shorterlength butt than the needles 29. Next thereto on the right is a singlespecial short needle 27 and next thereto on the right is a needle 29immediately beyond which is a special short needle 27,- next to which isa needle 28, and thereafter follows the large group of special shortneedles 27. It is to be understood wherever positioned, receive merelythe main thread or yarn, and that the clocking threads or yarns arereceived upon the. designing needles 28, 29, 30, which, of course, alsoreceive the main thread or yarn. The long butt needles 26 receive onlythe main thread or yarn.

In accordance with my invention and in order, in the disclosedembodiment thereof, to move the cams 24, 25 positively so that a clockedstocking made by. the float thread process shall result, I provide forcertain movements of said cams 24,,25. Said cam 25, herein termed anauxiliary cam, has only two positions, namely, the in positionillustrated in Fig. 10 and occupied by it at all times excepting duringheel and toe work, and the out position which is represented in Fig. 13,such position being occupied for and during heel and toe work. In theposition of the auxiliary cam 25 shown in Fig. 10, all of the needlesengage by their butts the said auxiliary cam and are moved down therebyto bring them under the influence of the stitch cam 21. When saidauxiliary cam 25 is in its out position, none of the needle butts isengaged thereby; that is to say,

said auxiliary cam 25 does not function during the knitting of the heeland toe.

The means for operating said auxiliary cam 25 will be hereinafterdescribed.

that the needles 27 The top guide cam 24 has four positions respectivelyindicated in Figs. 10, 11, 12 and 13. The number of these positions isdetermined by the number of different lengths of the designing needles,which in this embodiment of the invention is three.

Therefore in Fig. 10 the said cam 24 is represented as in a position tomove.,downwardly all needles excepting the shortest buttdesigning-needles 30. In the position shown in Fig. 11, said cam 24 hasbeen moved outwardly an additional step so as to permit to pass therebywithout moving downward, not only the shortest butt needles 30, but thenext shortest length butt needles 29w In the position shown in Fig. 12,the cam 24 has been moved outward another ste so that it permits topassthereby with out downward movement not only the shortest buttneedles 30 and the next shortest butt needle 29, but also the needles 28which are thelongest butt needles of the designing needles. In thepresent embodiment of the invention, when the cam 24 is inthe positionshown in Fig. 10 a clocking portion or area of a single stripe only ismade; when in the position shown in Fig. 11 a clocking area of threestripes' is made, and when in the position shown in Fig. 12 a clockingarea of five stripes is made. When the cam 24 is moved into the positionshown in Fig. 13, all needles are moved down wardly by it and hence noclocking stripe is made.

In order to move the cam 24 into the several positions any suitablemeans may be em ployed. I have represented said cam as having thereinlengthwise extending slots 31 to receive bolts or screws 32 extendinginto the cam block .20. In order to move the said i cam 24 in and out soas to position it as described, I have provided a link 33 secured by ascrew 34 to the top face of the said cam 24. Said link 33 is bent asshown and near its x outer end is pivotally connected at'35 to an arm ofa bell crank lever 36 pivoted at '37, and to the outer end of which at38 is pivotally connected an end of an upright rod 39. Said rod hasthereon a collar 40 between which and the point-of pivotal connection 38is a coil spring 41 tending to move said rod 39 downward. At its lowerend said rod 39 is pivotally connected at 42 to one arm of a rockinglever 43 pivoted ,to the framing of the machine and having a cam arm 44resting upon the links of, the pattern chain 45: a The are vidingclocking areas at the proper points.

The auxiliary cam 25, as stated, has but two positions. Said cam is asshown in Fig. 6

provided with two slots 46 through which ex:

at the .1

tend screws 47 from the cam blocks sd th purpose of pro- 1125 said cammay be movedin and out. In order to move the said cam, any suitablemeans may be provided, but herein for the purpose I have provided thefollowing means, shown most clearly in Figs. 5, 6 and 14. To thesaid camis secured by a bolt 48 a link 49 which, as shown in Fig. 14, ispivotally connected at 50 to a lever 51 fpivoted at 52 upon a bracket orpart rising om the bed plate of the machine. The lever 51 is of generalright angled form and to its outer end is connected at 54 a coil spring55, the upper end of which is connected at 5,6 to an arm 57 fixedlysecured to the bracket 53 by screws or bolts 58. The spring tends tomove the auxiliary cam 25 outward. Such outward movement is, however,resisted by a lever 59 pivoted at 60 upon a bracket upon the bed plateas shown inFig. 14:. Said lever 59 has a bent end 62 resting upon thehorizontal portion of the lever 51 in a sliding relation. It is evidentthat when the longer arm 63 of the lever 59 is moved downwar ly, thelever 51 is moved into such position as positively to move the auxiliarycam 25 inward. In order to impart the desired movements to said lever59, the arm 64 thereof is pivotally connected at 65 to the upper end ofan up right rod or link 66. As shown in Fig. 5, said rod 66 has securedthereto a collar 67 to which is connected one'end of a coil spring 68,the upper end thereof being connected at 69 to the framing of themachine. Pivotally connected at the lower end of the rod or link 66 at70 is a lever 71 pivoted at 72 upon the framing and having an arm 7 3provided with a toe or end 74 resting upon a special cam shown at 75 assecured upon the main pattern shaft 76. The toe 74 of the said lever 71is held in en agement with the surface of the cam 75 by t e coiledspring 68, and so long as the lever 71 is in the position shown in Fig.5

the cam 25 remains in its'in position shown in Figs; 10, 11, 12. Thesaid cam 75 is provided'with elevations 77 and 78, the former being forthe toe and the latter for the heel; When the toe 74.- of the lever 71ridesupon either projection 77 or 78, the said cam 25 is moved outwardinto the position shown in Fig. 13. Said cam 25 is in its in positionduring the knitting of the leg and the foot.

It is evident that the precise movements and the timing of the movementsof the cam 24 depend upon the form of links used and.

the arrangement thereof upon the patternchain. When links are employed,such as shown in Fig. 4, each special link 6, 7, 8 contion and "fromFig. 7 that the designingl rea trols twelve courses. In that form oflink shown in Fig. 4" each special link 9 10 has three ste parts 79, 80,81,,/each 0 which controls our courses.

It is evident from the foregoing descripneedles take the clocking oradditional or threads at a slightly higher level than the 5 I needlestake the main knitting thread or am. In order to provide for the properfeeding of the clocking thread or threads; I preferably provide specialthread fingers f' shown: in Figs. 15 and 16. The fingers are 70generally similar to those of the Banner machine, and the entire groupof fingers is represented as pivoted at 82-upon the latch ring 82' Inthepresent instance, I have re resented four thread'fingers, that indicateat 75 83 supplying the regular thread or yarn forv the leg and the foot,that indicated at 84 supplying another thread or yarn for the heel I andthe toe, and the fingers 85 and 86 supplying the clocking threads. Thefinger. 86 is so represented in Fig. 16. ,It is provided with a passage87 extending therethrough and at its inner facewithfi short tube 88which extends close to the stem of the needles generally indicated at19, so as to make certain 95 that such thread is received thereby.

It will be understood from the foregoing description that I haveprovided for the positive control through the agency of the knittingmechanism of the top guard cam-24 90 and the auxiliary cam 25. I amaware 10f the fact that it has heretofore been proposed, I as inthepatent to Robinson No. 1,291,155, to employ two cams, one ofwhich isengaged and moved by needle butts of one length and the othenof which isengaged and moved by needle butts of another length,and hence in anon-positive manner, said cams being. primarily intended for use inmaking a parallel sided high splice. By my invention, however, the twocams 24, 25 are positively controlled by the knitting mechanism, and arenot moved by the needles.

Having thus described one illustrative embodiment of my invention, Idesire it to be' o understood that although specific terms are employed,they are. used in a generic and descriptive sense and not for purposesof limi tation, the scope of the invention being set a forth in thefollowing claims.

Claims: 1..In a circular, independent needle, siery knitting machineattachment for maklngopposite so-called clocking areas composed of anadditional thread or threads, said in; areas connected together by-floatportions of said threads, which float portions extend un-' interruptedlyfrom one of said clocking areas to the other, and for whichneedleshaving contrasting butts are provided, a"two-part top guide camat and constituting a part of the stitch cam set, and mechanicalconnections for automatically and separately moving each part of saidtwo-part top guide cam so. as to rendersaid two parts active ornonactive upon certain needles, according to the contrasting. buttformation. y Y

2. In a circular, independent needle, hosiery knitting machineattachment for making opposite so-called clocking areas com- 13(mentioned posed of an additional thread or threads, said areas connectedtogether by float portions of said threads, which float'portions extend11n-.. interruptedly from one of said clocking areas to the other, andfor which needles having contrasting butts are, provided, a two-part topguide cam at and constituting a part of the stitch cam set? one of saidcam parts being substantially centrally arranged with respect. to thestitch cams and the other of said cam parts being arranged at one sideof the first part, both of said cam parts being restrained from movementin a direction circumferentiailly of the needle circle, and independentconnections from a moving part of the machine for positively moving bothof said cam p arts outand in, in accordance with the shape of needlebutts upon which said cams are to operate. I 3. In a circular,independent needle, hosiery knitting machine attachment for makingopposite so-called clocking areas composed of an additional thread orthreads, said areas connected together by float portions of saidthreads, which float portions extend uninterruptedly from one of saidclocking areas to the other, and for which needles having contrastingbutts are provided, a two-part top guide cam at and constitfiting a partof the stitch cam set, one of said cam parts be-- ing substantiallycentrally arranged with respect to the stitch cams and the other of saidcam parts being arranged at one side of the first mentioned part, bothof said cam parts being restrained from movement in a direction I sieryknitting machine circumferentially of the needle circle, the patternshaft and independent connections from said shaft to said two cam partsrespectively to move them out and in according to the length of theneedle butts upon which they are to operate.

4. In a circular, independent needle, hoattachment for making oppositeso-called clocking areas com.- posed of an additional thread or threads,said areas connected together by float portions of said threads, whichfloat portions extend un interruptedly from one of said clocking areasto the other, and for which needles having contrasting butts areprovided, a two-part top guide cam at and constituting a part of thestitch cam set, one of said camrparts being substantially centrallyarranged with respect to the stitch cams and the other of said cam partsbeing arranged at one side of the first mentioned part, both of said camparts being restrained from movement in a direction circumferentially oftheneedle circle the pattern shaft, connections'therefrpm to the Secondmentioned cam part for rendering said cam part inactive during heel andtoe work, and other connections extending from said pattern shaft to thefirst mentioned cam part to move said first mentioned cam part out andrendering said cam mentioned part, both of said cam of said firstmentioned cam "said first mentioned z in in a series. of stepscorresponding to the lengths of the needle butts to be acted upon bysaid first mentioned cam art.

5. In a circular, independent needle, hosiery knitting machineattachment for making opposite socalled clocking areas composed of anadditional thread or threads, said I areas connected together by floatportions of said threads, which float portions extend part ofthe stitchcam set, one of said cam parts being substantially centrally arrangedwith respect to the stitch cams and the other of said cam parts beingarranged at one side of the first mentioned part, both of said cam partsbeing restrained from movement ,in a direction 'circumferentially of theneedle circle, the pattern shaft, connections therefrom to the secondmentioned cam part for part inactive during heel and toe work and otherconnections extending from said pattern shaft to the first mentioned campart to move said first men; tioned cam patt out and in in a series ofthree steps each, corresponding to the'lengths of the needle butts to beacted upon by said first mentioned cam part.

6. In a ,circular, independent needle, hosiery knittingmachineattachment for making. opposite so-called clocking areas composedof an additional thread or threads, said areas connected together byfloat portions of said threads, which float portions extenduninterruptedly fromone of said clocking areas to the other, and forwhich having contrast ifig butts are provided, a twopart top guide camat and constituting a part of the stitch cam setfone of said parts beingsubstantiallycentrally arranged with respect to the stitch cams and theother of said cam parts being arranged at one side of the first partsbeing restrained from movement in a direction circumferentially of theneedle circle, the pat;

tern shaft, a pattern member thereon having cam formations for movingsaid second mentioned cam part outlof action during heel and toe work,mechanical connections from said pattern member mentioned cam part; thepattern chain upon said pattern shaft having special link formations forcontrolling the in and out positions J part and connections from saidspecial link formations to said first mentioned cam part for movinggthelatter out and in in accordance with the length of needle butts to beacted upon by 0am part.

'7. In a circular, siery knitting machine attachment for making oppositesorcalled clocking areas composed of an additional thread or threads,

independent needle: ho-

needles to said second of said cam parts being restrained said areasconnected together by float portions of said threads, which floatportions extend uninterruptedly y from one of said clocking areas to theother, and for which needles having contrasting butts-are provided, atwo-part top guide cam at and constituting a part of the stitch cam set,one of said parts being substantially centrally arranged with respecttothe stitch cams and the other of said cam parts being arranged at oneside of the first mentioned part, both i from movement in a directioncircumferentially of the needle circle, the pattern shaft, a patternmember thereonhaving cam formations for moving said second mentioned campart out of action during heel and toe work, mechanical connections fromsaid pattern member to said second mentioned canr part; the patternchain upon said pattern shaft having speciallink formations forcontrolling the in and out positions of saidfirst, mentioned cam partand connections from said special link formations'to said firstmentioned cam part for moving the latter out and in in a series of threesteps each way in accordance with the length of needle butts to be actedupon by said first mentioned cam part. a

8. In a circular, independent needle, hosiery knitting machineattachment for making opposite so-called' clocking areas composed of anadditional/thread or threads, said areas connected together by floatportions oi said threads, which float portions extend uninterruptedlyfrom one 01 said clocking areas to the other, and'for which needleshaving contrasting butts are provided, a twopart top guide cam at andconstituting a part of the stitch cam set, both of said cam parts beingarranged between the stitch cams of said cam set but at a higher leveland serving to direct needles down to one or .the other of said stitchcams, connections for automatically and separately moving each part ofsaid two-part-top I guide cam so as to render said two parts act1ve ornon-active upon certain needles, ac-

, cording to the contrasting butt formation.

9. In a circular, independent needle, hosiery knitting machineattachment for mak ing opposite so-called clocking areas composed of anadditional thread or threads,

said areas connected together by float portions of said threads, whichfloat ortions extend uninterruptedly from one 0 said clocking-areas tothe other, and for which needles having contrasting butts are provided,a twopart top guide cam at-and constituting apart of the stitch cam set,both of said cam parts being arranged between the stitch cams of saidcam set but at a higher level and serving to direct needles down to oneor the other of said stitch cams one oi said cam parts beingsubstantially centrally arranged and mechanical to the stitch cams andthe other

